Constantly pulling hair back tightly (especially in the same style daily) can lead to a type of hair loss caused by tension on the scalp.

5. Hair ties collect bacteria

Like makeup brushes, they can accumulate dirt, oil, and bacteria—especially if you wear them on your wrist often.

Wash them or replace them regularly, especially after workouts.

6. They’re often an emotional or nostalgic item

Many people keep random hair ties around — in bags, on doorknobs, in cars — and they often carry a strange, comforting familiarity.

Some even wear them as a subtle accessory or out of habit, not function.